the number equivalent to the product of two and two; one more than three and one less than five, a group or unit of four people or things

on all fours, four corners of the earth/world, four-letter word

Formal and Informal Expressions of four

In different contexts, you can replace 'four' with suitable alternatives. In a more formal setting, 'quartet, tetrad' is apt. In informal speech or writing, 'quad' is a commonplace synonym.

four: Explore its Definition & Usage

four Definition

1the number equivalent to the product of two and two; one more than three and one less than five
2a group or unit of four people or things

Using four: Examples

Take a moment to familiarize yourself with how "four" can be used in various situations through the following examples!

Example
I have four siblings.
Example
The table can seat four people.
Example
Four is my lucky number.

four Synonyms and Antonyms

Synonyms for four

Phrases with four

on all fours
on hands and knees
Example
The baby crawled on all fours.
four corners of the earth/world
all parts of the world
Example
They traveled to the four corners of the earth to find rare artifacts.
four-letter word
a swear word or taboo word
Example
He used a four-letter word when he stubbed his toe.

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Summary: four in Brief

'Four' [fɔː(r)] is a noun that refers to the number equivalent to the product of two and two, or a group of four people or things. It is commonly used in counting, as in 'I have four siblings,' and in measurements, such as 'The table can seat four people.' The phrase 'on all fours' means on hands and knees, while 'four corners of the earth/world' refers to all parts of the world. 'Four-letter word' denotes a swear word or taboo word.